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US5500316A Expired / Lapsed US ⏱️ 0.0 years remaining

Color negative film with contrast adjusted for electronic scanning

Assignee: Eastman Kodak Co
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Filing: 1994-12-05
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Granted: 1996-03-19
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Expires: 2014-12-05
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Abstract

Abstract The process for forming a video image with a telecine transfer device typically comprises (a) exposing a color negative photographic film comprising red, green and blue color sensitive records which generate image dyes upon exposure and processing of the film, (b) processing the exposed film to form a developed image, and (c) converting the developed image into video signals representative of the developed image with a telecine transfer device, wherein the peak spectral absorbance wavelength of the image dyes generated by the red color record of the film is substantially more offset from the red peak spectral response of the telecine transfer device than the peak spectral absorbance wavelength of the image dyes generated by the green color record of the film is offset from the green peak spectral response of the the telecine transfer device. An improvement is described comprising using a film in the process wherein the contrast of the red color record relative to the contrast of the green color record is set to compensate for reduced modulation of red density relative to green density in the telecine transfer device, and to result in a red channel to green channel contrast ratio in the telecine transfer image of at least 0.96 before any independent single channel adjustments.

Inventors

  • 👤 Mitchell J. Bogdanowicz
  • 👤 Christopher L. DuMont

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 13:11
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3041; H; H04; H04N; H04N9/00; H04N9/11

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 207 words
In a process for forming a video image with a telecine transfer device comprising: (a) exposing a color negative photographic film comprising red, green and blue color sensitive records which generate image dyes upon exposure and processing of the film, (b) processing the exposed film to form a developed image, and (c) converting the developed image into video signals representative of the developed image with a telecine transfer device, wherein the peak spectral absorbance wavelength of the image dyes generated by the red color record of the film is substantially more offset from the red peak spectral response of the telecine transfer device than the peak spectral absorbance wavelength of the image dyes generated by the green color record of the film is offset from the green peak spectral response of the the telecine transfer device, the improvement comprising using a film wherein the contrast of the red color record relative to the contrast of the green color record is set to compensate for reduced modulation of red dye density relative to green dye density in the telecine transfer device, and to result in a red channel to green channel contrast ratio in the telecine transfer image of at least 0.96 before any independent single channel adjustments.
Claim 2
Dependent Claim 207 words
In a process for forming a video image with a telecine transfer device comprising: (a) exposing a color negative photographic film comprising red, green and blue color sensitive records which generate image dyes upon exposure and processing of the film, (b) processing the exposed film to form a developed image, and (c) converting the developed image into video signals representative of the developed image with a telecine transfer device, wherein the peak spectral absorbance wavelength of the image dyes generated by the red color record of the film is substantially more offset from the red peak spectral response of the telecine transfer device than the peak spectral absorbance wavelength of the image dyes generated by the green color record of the film is offset from the green peak spectral response of the the telecine transfer device, the improvement comprising using a film wherein the contrast of the red color record relative to the contrast of the green color record is set to compensate for reduced modulation of red dye density relative to green dye density in the telecine transfer device, and to result in a red channel to green channel contrast ratio in the telecine transfer image of at least 0.96 before any independent single channel adjustments.
Claim 3
Dependent Claim 31 words
A process according to claim 1, wherein a red channel to green channel contrast ratio in the telecine transfer image of about 1.00 is obtained before any independent single channel adjustments.

References Cited (Backward Citations)

US5391443A Cited
US5300381A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1999-03-19 1999-09-18 2000-03-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2003-03-19 2003-09-18 2004-03-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2007-03-19 2007-09-18 2008-03-19 $7700.00 Window Closed / Lapsed

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